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<p><strong>Phosphorescence of fiberglass fleece</strong></p> <p>I tested different materials in terms of phosphorescence. A well known material is zinc sulfide doped with other metals.</p> <p>An other material is europium doped strontium aluminate.</p> <p>Both materials have one thing in common. Corner-sharing polyeders.</p> <p>Glass has corner-linked polyeders too.</p> <p>Thus I took a piece of a fiberglass fleece and held it under a black light lamp.</p> <p>Then I went into my dark windowless bathroom and held it against the white tiles. The fiberglass fleece seemed to glow!</p> <p>I took another piece of a fiberglass fleece and repeated the procedure. This piece of a fiberglass fleece glowed too. I folded the piece several times to amplify the glow.</p> <p>With success!</p> <p>First I held the glow for a faint reflection of light from somewhere.</p> <p>The color of the glow is red. A night light from a stack of small fiberglass mats is an application!</p> <p>Could the finish on the glass fiber fleece cause the phosphorescence? </p> <p>Generally, yes. But I removed the finish by vigorously heating the fleece. The phosphorescence of the now very soft fleece remained unchanged!</p> <p>I also found a triboluminescence of the folded fleece which I put into a small plastic bag.</p>
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